1. Department of Pulmonology, Hospital Universitari Mútua Terrassa University of Barcelona Terrassa Spain
2. Department of Medicine, Medical School University of Barcelona Barcelona Spain
3. Network of Centres for Biomedical Research in Respiratory Diseases (CIBERES) Lung Cancer Group Terrassa Spain
4. Department of Thoracic Surgery, Hospital Universitari Mútua Terrassa University of Barcelona Terrassa Spain
5. Department of Morphological Sciences, Medical School Autonomous University of Barcelona Cerdanyola Spain